Island



(No Model.)

' D. M. SMALL.

APPARATUS FOR. ALLAYING THE SENSIBILITY OF A TOOTH.

N0.V408,898. Patented Aug. 13,1889.

WITNESSES 1 lgVENTCIR.

UNITED STATES PATENT OFFICE.

DEXTER M. SMALL, OF PROVIDENCE, RHODE ISLAND.

APPARATUS FOR. ALLA YlNG THE SENSIBIL-ITY OF A TOOTH.

SPECIFICATION forming part of Letters Patent No. 408,898, dated August 13, 1889.

Application filed November 14, 1888. Serial No. 290,824. (No model.)

To aZZ wl'wnt it may concern:

Be it known that I, DEXTER M. SMALL, of the city and county of Providence, in the State of Rhode Island, have invented an improved apparatus for introducing a small jet of heated air or of steam with or without an admixture of air (preferably with) upon or into the cavity of a tooth to temporarily allay the sensibility thereof while enlarging cavities therein, 850., of which the following is a specification.

The accompanying drawing, which forms a part of this specification, is a side view of my device.

A is a hollow bulb for containing and in which a liquid is vaporized by means of a small alcohol-lamp B, connected therewith, so as to be free to swing back and forth, and thus maintain an upright position whatever the position of the bulb A while in use.

C is a tube connected therewith, and over which slides, as seen,the outlettubeD,which conveys the steam, &c., to the tooth. It is free to easily turn on the tube 0 for convenience in reaching different cavities or teeth with the point thereof.

E is a shield for protecting the fingers from the heat of the tube D, by which the apparatus is held.

The force or rapidity with which steam issues from the orifice of outlet-pipe D upon the tooth, as also the heat of the vapor, can

be regulated by adj ustiug the flame of the lamp, but preferably by introducing air into the bulb A, and thus miningit with the steam by means of inlet-tube G, flexible tube H II, and a device for forcing therein, either by the hand or foot, an intermittent or continuous (preferably the latter) stream of air, the rubber bulb I being sufficient for the former, and a supplementaryone J (each with suitable valves) being necessary to produce thelattcr.

The water or other liquid is conveniently introduced into the bulb A through the tube C by means of a small funnel.

I claim 1. The combination, with a device for introducing a jet of steam or heated air into the cavity of a tooth, of a shield E, near the orifice of the outlet-pipe, substantially as and for the purpose set forth.

2. The combination, with the reservoir or air-chamber of a dental tool or hand-instrument, having a short outlet-pipe D, for introducing a heated product into the cavity of a tooth for the purpose set forth, of a burner or diminutive heating apparatus constructed and arranged so as to be supported in connection therewith by the manipulating hand of the operator.

DEXTER M. SMALL. Witnesses:

JOHN M. RoUNDs, J. H. PERKINS. 

